package cl.antartis.interac.servlets;

import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;

public class UploadDocumento extends HttpServlet {
	
	private static final long serialVersionUID = 6861933068694407246L;
	
	private String pagDestino = "";
	
	private String ruta;
	//private static final String _RUTA_ = "documentos";
	//private static final String _RUTA_ = "/home/ec2-user/DOCS/";
	private static final String _RUTA_ = "C:/Users/Joaco/Documents/DEPLOY/upload";
	private static final int MEMORY_THRESHOLD   = 1024 * 1024 * 3;  // 3MB
    private static final int MAX_FILE_SIZE      = 1024 * 1024 * 40; // 40MB
    private static final int MAX_REQUEST_SIZE   = 1024 * 1024 * 50; // 50MB
    
    public UploadDocumento(){
    	super();
    }
    
    public String getRuta(){
		return this._RUTA_;
	}
    
    public int getMaxFileSize(){
		return MAX_FILE_SIZE;
	}
	
	public int getMaxRequestSize(){
		return MAX_REQUEST_SIZE;
	}
	
	public int getMemoryThreshold(){
		return MEMORY_THRESHOLD;
	}
	
	public void setRuta(String ruta){
    	this.ruta = ruta;
	}
	
	protected void doPost(HttpServletRequest request,
            HttpServletResponse response) throws ServletException, IOException {
        // checks if the request actually contains upload file
        if (!ServletFileUpload.isMultipartContent(request)) {
            // if not, we stop here
            PrintWriter writer = response.getWriter();
            writer.println("Error: Form must has enctype=multipart/form-data.");
            writer.flush();
            return;
        }
 
        // configures upload settings
        DiskFileItemFactory factory = new DiskFileItemFactory();
        // sets memory threshold - beyond which files are stored in disk
        factory.setSizeThreshold(MEMORY_THRESHOLD);
        // sets temporary location to store files
        factory.setRepository(new File(System.getProperty("java.io.tmpdir")));
 
        ServletFileUpload upload = new ServletFileUpload(factory);
         
        // sets maximum size of upload file
        upload.setFileSizeMax(MAX_FILE_SIZE);
         
        // sets maximum size of request (include file + form data)
        upload.setSizeMax(MAX_REQUEST_SIZE);
 
        // constructs the directory path to store upload file
        // this path is relative to application's directory
        String uploadPath = getServletContext().getRealPath("")
                + File.separator + _RUTA_;
         
        // creates the directory if it does not exist
        File uploadDir = new File(_RUTA_);
        if (!uploadDir.exists()) {
            uploadDir.mkdir();
        }
 
        try {
            // parses the request's content to extract file data
            @SuppressWarnings("unchecked")
            List<FileItem> formItems = upload.parseRequest(request);
 
            if (formItems != null && formItems.size() > 0) {
                // iterates over form's fields
                for (FileItem item : formItems) {
                    // processes only fields that are not form fields
                    if (!item.isFormField()) {
                        String fileName = new File(item.getName()).getName();
                        //String filePath = uploadPath + File.separator + fileName;
                        File storeFile = new File(_RUTA_+File.separator+fileName);
 
                        // saves the file on disk
                        item.write(storeFile);
                        request.setAttribute("message",
                            "Upload has been done successfully!");
                    }
                }
            }
        } catch (Exception ex) {
            request.setAttribute("message",
                    "There was an error: " + ex.getMessage());
        }
        // redirects client to message page
        getServletContext().getRequestDispatcher("/Servlet?accion=documentos").forward(
                request, response);
    }
}
